Hot-dip galvanized marlin.

A cut-off nail is a machine-forged nail with a tapered blade and a flat or semi-circular head. The tapered blade allows the nail to be pulled out without cracking the wood. After straightening the nail, it can be used again – unlike modern nails.

Cut nails began to be produced in the latter part of the 19th century and gradually replaced hand-forged nails. The nail is cut from heavy steel plate, hence the name. In general, nails can be divided into the following categories of use.

• 2.5 inches. For moldings, linings and interior joinery.
• 3 inches. For nailing beadboard panels etc. internally. For nailing board lining on the outside.
• 4 inches. For board lining and for nailing cover strips on the outside.
• 5 inches. For nailing floors etc. internally.

So-called small nails, or pine nails, intended for normal carpentry needs, such as nailing of roof and wall panels, floors, linings, plinths, etc. in environments from before the middle of the 19th century. Hand-forged nails were replaced in the latter half of the 19th century by so-called rock nails.

When choosing the length of the nail, it is usually said that 1/3 should be in the board and at least 2/3 in the joist.

In general, the hand-forged nail can be divided into the following categories of use:

• 1-1.5 inches Window fittings
• 2 inches Hand-planed moldings, trim and other millwork
• 3 inch wedge-sawn roof, wall and breast panels etc. internally. And for nailing wedge-sawn board lining on the outside.
• 4 inches Larger board lining and for nailing cover strips on the outside.
• 5 inch wedge-sawn floors etc. inside and for coarser joinery outside.